紫外激发GdNbO_4:Tb^(3+)色度可调荧光粉的制备和发光性能的研究  

Synthesis and Photoluminescence Properties of Multicolor Tunable GdNbO_4: Tb^(3+) Phosphors

作　　者：张璐[1] 易双萍[1] 赵韦人[1] 胡小雪 

机构地区：[1]广东工业大学物理与光电工程学院,广东广州51006

出　　处：《广东工业大学学报》2017年第5期91-95,共5页Journal of Guangdong University of Technology

基　　金：广东省科技发展专项(2016A010103029);广州市科技计划项目科学研究专项(201607010179)

摘　　要：采用高温固相法制备了GdNbO_4:Tb^(3+)荧光粉,系统地分析了该荧光粉的物相组成、漫反射光谱、荧光光谱以及荧光寿命衰减曲线.GdNbO_4作为一种自激活发光的荧光粉,在200~325 nm范围有很宽的吸收.当掺杂了Tb^(3+)之后,掺杂离子会占据基质的格点位置并伴有基质到Tb^(3+)的能量转移.与此同时,基质在紫外区域的吸收会变强.通过研究计算分析可得激活剂Tb^(3+)的电偶极矩–电偶极矩相互作用是发生浓度猝灭的原因.A color-tunable phosphor based on Tb^（3＋） doped GdNbO_4 were synthesized by a traditional solid-state reaction method. X-ray powder diffraction（XRD）, diffused reflectance spectra, photoluminescence spectra and decay curves were utilized to characterize the as-prepared phosphors. The GdNbO_4 host was proved to be a selfactivated phosphor with broad absorption range from 200 to 325 nm. When Tb^（3＋） ions were doped into the host lattice, the energy transfer from host to Tb^（3＋） was identified. And the broad absorption in the UV region was changed and enhanced. Furthermore, the electric dipole-dipole interaction is the major mechanism for the concentration quenching.

关 键 词：GdNbO4 光致发光 能量传递 

分 类 号：TB321[一般工业技术—材料科学与工程]